— 197 — 



acumen, their upper cells suboblong, less jjorose; costa more 

 abbreviate, nearly smooth at back. — Amer. Pacif. distr. r. 

 Can. Vane, isl.: J. Roell. 



Var. Schlotfhaueri Barnes. 

 ■ Leaves shorter, broad-er- acuminate, their upper cfeUs gen. sub- 

 oval, costa not bilamellate. Habit of D. brachycaulori. — 

 Amer. r. U. S Yellowstone Park 2100 metr. a. s.: Roell. 

 43.D.subpalu8tre C. M. et Kindb. 1. c. 



Leaves serrulate in the greater part of. the somewhat long 

 narrow (sometimes brittle) acumen, very concave below, sub- 

 convolute at base of acumen, sometimes short-decurrent, not 

 spreading, sometimes undulate when dry; cells ^s in D. scopa- 

 rium; costa percurrent, serrulate in upper part but not lamellate. 

 Perichetial leaves long-aristatc. Capsule nearly smooth or finally 

 sulcate. Tufts often yellowish. — Bogs r. Amer. Can.: J. and 

 J. M. Macoun. U. S.: Roell. Eur. Sweden in Lapland: E. 

 Nyman. 

 44.D.hyaliiium Kindb. in Hedwigia 1896, p. 61. 



Leaves faintly denticulate near apex, narrower and somewhat 

 long-acuminate; alar cells nearly hyaline rectangular not well- 

 defined; other cells hyaline not porose, narrow-linear except tbe 

 oval apical; costa faintly denticulate near apex, narrow above 

 but very dilated at base, not excurrent. Tufts loose very spa- 

 ringly radiculose. Capsules unknown. — ^ Alp. region r. Amer. 

 U. S. Nat. Park 2100 metr. a. g.: Roell. 

 5. Fuscescentiformia. 



A. Inner perichetial leaves longer than the awn. 



a. Leaves very long and not crisped but falcate or nearly 

 straight when dry, sometimes brittle; costa very narrow. Cap- 

 sule large; pedicel very long. Tufts shining very high. 

 45.D.maju8 Smith. 



Leaves with subulate nearly wholly serrulate acumen; angular- 

 cells diversiform, the inner hyaline; other cells long uniform 

 porose; costa excurrent rough at least in upper half. Capsules 

 faintly striate us. clustered. Inner perichetial leaves denticulate, 

 truncate below the awn. Tufts green or yellowish, .-- On- 

 earth and shaded rocks in woods. Eur. not r. Sweden commoni 

 Amer. r. Can. eastern districts: J. Macoun. U. S.: Roell. Alaska: 

 i, M. Macoun, 



46.D.Howellii Renauld et Cardot hot. gaz, 1889. — D. an- 

 gustifolium Kindb. bull. Torr. club XVII, 1890 (in part). 



Leaves with sublinear in upper half serriilateacumen,, narrower 



